> But the service isn't fully baked yet for me, because they're not explaining how they're enforcing the trustworthiness of ProtonVPN. I have no idea if ProtonVPN is as trustworthy as Mozilla -- maybe it is, but I don't want to learn and stay on top of that. Instead I want premium.firefox.com/vpn/ to convince me that, if I use Mozilla's service, I'm fully benefiting from their trustworthiness.

I'm also interested in this. I cannot help but wonder if the reason is 'because they gave us money to', like Firefox 'partnering' with google to make google search the default provider.